A speedster who raced around Manhattan in a car and posted a video of the stunt online was convicted in absentia on Thursday of reckless endangerment.

The driver, Adam Tang, 31, did not show up to court on Wednesday, when lawyers delivered their closing arguments. Justice Ann M. Donnelly of State Supreme Court in Manhattan issued a warrant for his arrest and revoked his $15,000 bail. He has 30 days to surrender to the court or he will be charged with bail-jumping, prosecutors said.

Mr. Tang’s lawyer, Greg Gomez, declined to say where his client was or whether he would show up for sentencing on Dec. 8. Reached by email after the verdict, Mr. Tang likewise did not reveal his whereabouts, but said he foresaw the outcome.

“It was a lost cause, so why bother fight against something that is rigged?” he wrote.

Mr. Tang faces up to a year in jail for the conviction on reckless endangerment, and another 30 days for reckless driving.

During the trial, Mr. Gomez contended his client might be guilty of speeding, but had never lost control of his car or put others in danger — in sharp contrast to the prosecution’s portrayal of Mr. Tang as a daredevil craving fame.

“This is a simple straightforward case of someone so hellbent on breaking a record that he put the lives of people at risk and for what?” one prosecutor, Timothy Duda, said in his opening statement. “For his 15 minutes of fame.”

On Aug. 26, 2013, just before dawn, Mr. Tang circled Manhattan in 24 minutes, weaving in and out of traffic in his BMW and reaching speeds of nearly 100 miles per hour at one point. He filmed the entire trip with a dashboard camera, then sped up the tape, inserted some electronic dance music and placed it on YouTube, using the name Afroduck.

That videotape, which Mr. Tang voluntarily turned over to prosecutors, was the main evidence against him. Prosecutors used it to prove he had gone twice the speed limit for much of the drive and an expert on traffic safety, Robert Genna, cataloged a number of near misses in which Mr. Tang, a day trader from Canada who lives with his wife on the Upper East Side, could have caused a fatal crash.

In interviews, jurors said Mr. Tang was clearly a skilled driver. Still, they were convinced that he had disregarded the safety of others, particularly as he sped across the Cross Bronx Expressway and raced down the crowded Harlem River Drive, toward the end of his circuit. There he tailgated cars and sliced in and out of lanes, cutting off other drivers.

“I think what he did was wrong,” one juror, Anthony Feliciano, 43, said. “I don’t condone that. You want to drag race, go to a drag race track. Not on my public highway.”

A second juror, Damascus Sookbirsingh, 61, said he at first was inclined to acquit Mr. Tang, because he had stopped at traffic lights and seemed to be an adept driver. But Mr. Sookbirsingh said other jurors persuaded him that Mr. Tang had taken unacceptable risks and that a message needed to be sent. “This is basically to set an example,” he said.

For his part, Mr. Tang said in emails to The New York Times that he believed the original video demonstrated he had driven fast but not recklessly. On Wednesday, as the judge was issuing a warrant for his arrest, Mr. Tang posted the undoctored version of the video on his YouTube channel. (His real-time soundtrack was not electronic dance music, but WCBS-FM.)

Prosecutors initially offered Mr. Tang a deal of six months in jail in return for pleading guilty to the top charge, his lawyer said.

In an email on Nov. 1, Mr. Tang said the district attorney had been unreasonable in plea talks, seeking a jail sentence for what he considered to be traffic violations. He said he chose to go to trial because he faced not only a year in jail, but also deportation and the loss of his car.

The district attorney, Cyrus R. Vance Jr., said Mr. Tang demonstrated “blatant disregard for our traffic laws” and placed lives at risk. “The city’s roadways are not a racetrack,” he said.

A version of this article appears in print on , on Page A25 of the New York edition with the headline: Driver Who Sped Around Manhattan in 24 Minutes Is Convicted of Reckless Endangerment. Order Reprints | Today’s Paper | Subscribe